I believe I have solved the issue. There were two problems: (1) Grail was using a variable of the wrong name, and (2) Dugi guides is leaking a variable into the global namespace. I have put up a prerelease version that hopefully fixes the issue if you are interested in trying it out. It can be found at http://ns1.mithrandir.com/WorldOfWarcraft/WhollyGrailPrerelease.shtml

I am not sure where that SavedVariables.lua file is from. Normally the file of interest for me would be the Grail.lua file from your SavedVariables directory. This report seems to be the same as some others that have been made. I had thought perhaps there was an interaction with DugisGuideViewerZ. Are you able to reproduce this such that you can test with only Wholly, Grail, and DugisGuideViewerZ active and have it reproduce?